fix: Fix async context handling in serve command and add integration tests

src/lfx/pyproject.toml

@@ -78,6 +78,13 @@ dev = [
     "pytest-cov>=7.0.0",
     "ruff>=0.9.10",
 ]
+integration = [
+    # Dependencies for running Simple Agent and other integration tests
+    "langchain-openai>=0.3.0,<1.0.0",
+    "langchain-community>=0.3.0,<1.0.0",
+    "beautifulsoup4>=4.12.0",
+    "lxml>=5.0.0",
+]
 
 [tool.coverage.run]
 branch = true

src/lfx/src/lfx/cli/commands.py

@@ -303,6 +303,9 @@ async def serve_command(
         console.print()
 
         # Start the server
+        # Use uvicorn.Server to properly handle async context
+        # uvicorn.run() uses asyncio.run() internally which fails when
+        # an event loop is already running (due to syncify decorator)
         try:
             config = uvicorn.Config(
                 serve_app,

src/lfx/tests/integration/__init__.py

@@ -0,0 +1 @@
+# Integration tests for lfx

src/lfx/tests/integration/cli/__init__.py

@@ -0,0 +1 @@
+# CLI integration tests